An intense stream of water of cross-sectional area \( A \) strikes a wall at an angle \( \theta ...

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An intense stream of water of cross-sectional area \( A \) strikes a wall at an angle \( \theta \) with the normal to the wall and returns back elastically. If the density of water is \( \rho \) and its velocity is \( v \), then the force exerted in the wall will be [DCE 2006]
(a) \( 2 A v \rho \cos \theta \)
(b) \( 2 A v^{2} \rho \cos \theta \)
(c) \( 2 A v^{2} \rho \)
(d) \( 2 A v \rho \)
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